Authenticity indicator

• Main Author: UKPABI PAULINE OZOEMENA
• Format: Patent
• Language: English
• Published: 16.01.2007
• Subjects: ADVERTISING; COLOUR PRINTING; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; LABELS OR NAME-PLATES; LINING MACHINES; PERFORMING OPERATIONS; PHYSICS; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SEALS; SIGNS; STAMPS; TRANSPORTING; TYPEWRITERS

A rapidly reversing authenticity indicator for substrates such as secure documents, tags and labels is described. The authenticity indicator comprises a substrate having provided thereon a coating of a colorless chromogenic material, a binder material and optional pigment. An applicator is provided...